Grid connection · Wales, United Kingdom
Dinorwig grid connection
Dinorwig grid connection is a grid connection in Wales, United Kingdom, with 1,644 MW of capacity, held by First Hydro Company.
Facts
Every value links to its source, and to the source's own record where it has one. Licences and last-checked dates are per row.
| Fact | Value | Source |
|---|---|---|
| Location | Wales (connects at Dinorwig 400kV Substation) | NESO TEC Register · NESO Open Data Licence v1.0 · checked 24 Oct 2026 |
| Status | Operating (built) | NESO TEC Register · NESO Open Data Licence v1.0 · checked 24 Oct 2026 |
| Holder | First Hydro Company | NESO TEC Register · NESO Open Data Licence v1.0 · checked 24 Oct 2026 |
| Attached to | Dinorwig | NESO TEC Register · NESO Open Data Licence v1.0 · checked 24 Oct 2026 |
| Capacity | 1,644 MW | NESO TEC Register · NESO Open Data Licence v1.0 · checked 24 Oct 2026 |
| Technology | Pump Storage | NESO TEC Register · NESO Open Data Licence v1.0 · checked 24 Oct 2026 |
| Grid operator | National Grid Electricity Transmission plc | NESO TEC Register · NESO Open Data Licence v1.0 · checked 24 Oct 2026 |
Research on this grid connection and its holder.Who holds it up to the parent company, the project behind it and its connection date, and an introduction to the holder.
Request researchHow it compares
Dinorwig grid connection is the 2nd-largest of 158 grid connections in Wales and the 37th-largest of 3,903 in the United Kingdom by capacity; its 1,644 MW is 0.37% of the 446,745 MW we hold for the United Kingdom. Ranks and totals cover the grid connections in our data that report their capacity, not every one in existence.
| Within | Rank | Total | Share |
|---|---|---|---|
| Wales | 2nd of 158 | 21,044 MW | 7.8% |
| United Kingdom | 37th of 3,903 | 446,745 MW | 0.37% |
| All grid connections in our data | 54th of 7,616 | 1,281,251 MW | 0.13% |
Holder, grid operator and place
More from First Hydro Company
- Dinorwig1,728 MW
- Ffestiniog360 MW
Other grid connections in Wales
- Pembroke Power Station grid connection2,199 MW
- Mona Offshore Wind Farm grid connection1,500 MW
- Connah's Quay grid connection1,380 MW
- Legacy Green Energy Centre grid connection1,200 MW
- Awel Y Mor grid connection1,100 MW
- Cilfynydd Green Energy Centre grid connection1,025 MW
- Pentir Green Energy Centre grid connection1,025 MW
- Swansea North Green Energy Centre grid connection1,025 MW
Data on this page
- California ISO. Checked 2026-10-24. CAISO queue report, CAISO Privacy and Terms of Use.
- SP Electricity North West, via Northern Powergrid Open Data. SP Electricity North West open data portal, CC BY 4.0.
- ERCOT GIS report. ERCOT GIS report, ERCOT Terms of Use.
- Supported by National Energy SO Open Data. NESO TEC Register, NESO Open Data Licence v1.0.
- Supported by Northern Powergrid Open Data. Northern Powergrid open data portal, Northern Powergrid Open Data Licence v1.0.
- NYISO interconnection queue. NYISO interconnection queue, Free reuse.
- PJM New Services Queue. PJM New Services Queue, Free reuse.
- SP Energy Networks, via Northern Powergrid Open Data. SP Energy Networks open data portal, CC BY 4.0.
- SSEN Distribution. SSEN Distribution data portal, CC BY 4.0.